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Finasteride

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Finasteride is a steroid derivative that competitively inhibits 5 alpha-reductase, the enzyme that converts testosterone to its active metabolite, dihydrotestosterone.

Five alpha-reductase is present in highest concentration in the male reproductive tissues, the skin, especially overlying the genitalia, and the liver.

Finasteride reduces prostate volume, increases urinary flow rate and improves symptoms scores. However, it has not been shown to reduce the need for surgical treatment.

At the dose recommended for the treatment of benign prostatic hypertrophy, it does not inhibit the formation or action of any other steroid hormones. It is a more potent inhibitor of the type II form of 5 alpha-reductase.

The summary of product characteristics should be consulted before prescribing this drug.


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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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